Here's the relevant description, buried far down in the story, although one shooter is still at large:

Two Navy yard employees interviewed on CNN said they were fired on in a hallway by a gunman they described as a tall black man.

A woman who gave her name as Terry Durham said that as she and co-workers were evacuating, she saw a man down the hall raise a rifle and fire toward them, hitting a wall. “He was tall. He appeared to be dark-skinned,” she said.

“He was a tall black guy,” said her co-worker, Todd Brundage, who is black. “He didn’t say a word.”